No communication with the Light Sensor Module (CLO).

1. Reboot the projector:

   1. Turn off the Light Source and cool down the Light Source for at least 1 minute if hot.

   2. Switch off the power of the unit and wait for at least 15 seconds.

   3. Switch on the power of the unit and respect normal startup procedure.

2. Check if the wire is connected with the CLO module (reference 1 of image) and with the Signal Backplane (reference 10 of image).

   Note: To access the Signal Backplane the top cover plate of the Light Processor compartment has to be removed. Removing the top cover plate will lead to an authorization request upon startup.

3. If the problem remains, replace the CLO module. See service manual chapter "Replacing the Light Sensor module (CLO)".